A source told Us Weekly that Viall, the upcoming season's bachelor, previously hooked up with one of the contestants long before the show started filming. He had no idea the old flame would be a contestant on the show.

"During the first day of taping, all of the girls came out, and he actually had slept with one of them at a wedding and never called her again," the source told Us Weekly.

The source said that Viall's previous hookup with the woman wasn't discussed on set, though it seems like this snafu would have taken some preparation. The publication's tipster said that the season's star "didn't want any girls on the show that he already knew or had a date with," so he probably had no idea.